Answer: Option A
:
A
The figure shown above represents the pathway of the impulse taken during a reflex action. The pathway is called reflex arc. The components of a reflex arc are:
A: Receptor: The receptor acts as a sensory organ and detects the external stimulus.
B: Sensory neuron: It takes the information detected by the receptor to the spinal cord. The spinal cord processes this information and gives a signal.
C: Motor neuron: It takes the signal from spinal cord to the effector organ.
D: Relay neuron: It connects the sensory neuron to the motor neuron.
The effector organ, in this case a muscle, does the action of pulling the hand away from hot pan.